Rotary engine.



F.- YANTES. ROTARY ENGINE. AIPLIOATION FILED JAN. 9, 1911. I 1,001, 1 14, Y Patented Aug. 22, 1911.

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P." YANTES.

ROTARY ENGINE.

- APPLICATION FILED JAN. 9, 1911. 1,001,1 14. Patented Aug. 22, 1911.

2 SHEETS-SHEET 2.

FRANK YANTES, OIE DELANO, MINNESOTA.

' ROTARY ENGINE.

Specification of Letters Patent.

Patented Aug. 22, 1911.

Application filed January 9, 1911. Serial No. 601,648.

To all whom it may concern:

Be it known that I, FRANK YANTEs, a citizen of the United States, residing at Delano, in the county of Wright and State of Minnesota, have invented a new and useful Rotary Engine; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to the art of engines, and the like, and itmore especially pertains to new and useful compound rotary steam engine;

The object of the invention is to provide an improved engine of this character, comprising practicability and simplicity in construction.

The invention comprises further features and combinations of parts hereinafter setforth, shown in the drawings and claimed.

In the drawings :Figure 1 is a view in side elevation of a rotary engine embodying the features of the invention. Fig. 2 is a top plan view of the engine. Fig. 3 is a vertical sectional view, showing the parts in elevation, and illustrating the rotor head in one position with regard to the automatic cut off drop valve (which is in the form of a solid body). Fig. 4 is a transverse section view on line 4-4 of Fig. 3. Fig. 5 is a sectional view on line 55 of Fig. 3. Fig. 6 is a detail view of the dash pot for cushioning the automatic cut off drop valve.

Referring to the annexed drawings, 1 designates the base of the engine, upon which the annular cylinder casing 2 is mounted and secured in any suitable manner. This casing 2 is provided with an annular chamber 3, which is closed by the end plates 4 and 5. The end plates 4 and 5 are secured to the casing 2 by the bolts 6.

Extending centrally and transversely of the engine casing 2 is the main driving shaft 7, on which the rotor head 8 is mounted so as to rotate therewith. Between the rotor head and the annular wall of the chamber 3, the steam chamber 9 is provided. The rotor head is provided with an off set solid portion 10, the outer circumference of which is arranged eccentrically with regard to the driving shaft 7 This portion 10 is formed as an integral part of the rotor head, and blends off into the rotor head at a point designated by the character 11. The other end of the portion 10 terminates abruptly into a shoulder 12, which is concaved as shown and is arranged offset to the center of the rotor head. The concavity of the shoulder 12 is concentric with the center of the shaft 15, so that the portion 19 of the valve 16 will sweep against it. This shoulder 12 constitutes the piston of the rotor head, against which the steam acts when expanding so as to impart motion to the rotor head. The portion 10 adjacent the abruptly arranged shoulder is provided with resilient packing means 13, which sweep and contact against the inner annular wall of the chamber 3 of the casing, as the rotor head is moving. It will be observed that as the rotor head 8 is finishing its rotary movement, the steam chamber 9 is gradually tapering off, by virtue of the gradual blending of the portion 10 into the rotor head 8. The eccentrically arranged circumference of the portion 10 sweeps by the inner annular 'wall of the chamber of the casing 2.

The casing 2 is formed with an integral 0H set casing 14, which is chambered out as shown. This off set casing 14 has its ends closed by the extensions of the end plates of the casing 2. Extending transversely and centrally of the off set-easing 14 is the shaft 15. Movable with the shaft 15 is the automatic cut off drop valve 16. This drop valve 16 is designed for the purpose of throttling the steam inlet 17 alternately, that is, as the .point 11 of the rotor head reaches the port-ion 19 of the out off valve 16, and while the portion 10 is passing the portion 19 the steam inlet is about to be throttled, as will be clearly apparent, special reference being had to Fig. 3. The utilized steam exhausts through the port 18. The drop out ofi valve 16' is formed with a concaved portion 19 which registers with the concaved portion of the abruptly arranged shoulder of the portion 10, when the rotor head is in the position as shown in Fig. 3. However, as the valve 16 is being. dropped behind the shoulder of the portion 10, the part 19 sweeps against the coneaved portion of the shoulder, and as steam enters the duct 21 of the valve 16 from the port 17, the steam acts to assist in dropping the valve. Leading into the port 17 is the pipe 25, through which the live steam enters, while extending into the port 18 is the pipe 26, from which the utilized steam exhausts. After the shoulder of the portion 10 of the rotor head passes the point 27 of the'casing 2, the utilized steam behind the shoulderassists in throwing the valve in the position shown in Fig. 3, by acting against the face 28- of the valve. The portion 29 of the valve being the heavier also assists the valve in dropping'behind the shoulder of the portion 10.

The engine is provided with. the usual form of governor mechanism 30, which operates the cut off valve 30, arranged in the pipe 25. The shaft 3O is provided with a bevel gear 31 which meshes with the bevel gear 31, on the shaft of which a pulley 31 is mounted. Passing about the pulley 31 is a belt- 31, which travels about the pulley 31*, on the shaft 7. As the shaft 7 rotates, the governor mechanism 30 is in turn operated, which controls the action of the cut off valve 30, which controls the intake of live steam through the pipe 25.

Arranged on one side of the casing of the engine is what may be termed an air chamber or dash pot 32, which is provided with the usual check valve 33. Movable in the air chamber; or dash pot is the piston 34 having the usual connecting rod 35 with the weighted arm 36 of the shaft 15. As the shaft 15 rocks, by virtue of the move of the valve 16, air is taken into the chamber 32, when the piston moves in one direction. When the piston moves in the opposite direction air is exhausted past the piston 34, there being in practice a slight clearance between the piston and the inner circumference of the chamber, thus cushioning the piston 34, which in turn allows the valve 16 to return to its normal position.

In operation steam is admitted through the pipe 25 through the duct 21, and against the shoulder 12. The steam acting against the shoulder 12 causes the rotor head to rotate, and with it the shaft 7, which in turn operates the governor operated out 01f valve 30, which controls the intake of steam. As the rotor head rotates, the portion 19 sweeps against the circumference of the head, and

, finally rides the portion 10 thereof, which raised the valve 16, so as to cut off the intake of steam at the port 17. As the valve 16 is raised air is drawn into the chamber 32, which cushions the valve when returning to its normal position. The valve 16 is provided with a suitable packing l6 as shown in Figs. 3 and 5, so as to prevent the live steam from passing by the valve.

The invention having been set forth, what is claimed as new and useful is In a rotary engine, a casing having a steam chamber-,a rotor head mounted in the outer chamber and provided with an off set portion with its outer circumference arranged eccentrically with regard to the center of the rotor head and terminating into an abruptly arranged shoulder arranged 01fset to the center of the rotor head, the shoulder having a concaved face, the off-set portion of head gradually diminishing in thickness until it blends into the rotor head at a point substantially opposite the shoulder but off set to the center of the rotor head, said casing including an extending off-set casing, an automatic gravitating cut off drop valve mounted in the off-set casing and provided with a concaved portion terminating into an edge designed to sweep against the concaved face as the valve drops behind the shoulder, the concaved face of the shoulder being concentric with the center of the drop valve, a steam intake to be throttled by the drop valve, an air chamber hav ing a piston therein, the drop valve having a weighted arm, connections between the weighted arm and the piston of the air chamber, the air chamber having a check valve and constituting means in combination with the piston in the chamber for cushioning the drop valve, the engine having an exhaust port for the utilized steam.

In testimony whereof I have signed my name to this specification in the presence of.

two subscribing witnesses.

FRANK YANTES.

WVitnesses:

FRED A. KNOLL, ADAM Fonsorr.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

